Sato Masayuki C, Motomura Hiroyuki
Graduate School of Agriculture; Forestry and Fisheries; Kagoshima University; 1-21-24 Korimoto; Kagoshima 890-0065; Japan.
The Kagoshima University Museum; 1-21-30 Korimoto; Kagoshima 890-0065; Japan.
Zootaxa. 2025 Feb 13;5588(1):174-184. doi: 10.11646/zootaxa.5588.1.8.
Tomiyamichthys hyacinthinus sp. nov. is described on the basis of four specimens from Kyushu, southern Japan. The new species is characterized by the following combination of characters: VI-I, 9 dorsal-fin rays; I, 9 anal-fin rays; 17 pectoral-fin rays; 45-48 lateral and 14-15 transverse scale rows; 4 + 8 or 9 (9) gill rakers of first gill arch; partially scaled prepelvic region; a pale blotch between fourth and fifth spines of first dorsal fin; second and third spines of first dorsal fin elongated, filamentous with orange bands in males; fourth spine of first dorsal fin longer than first in males; first dorsal fin trapezoid and dorsal-fin spines non-filamentous in females; 2 or 3 transverse rows of yellow blotches anteriorly and longitudinal yellow blotches posteriorly on caudal-fin membrane. Comparative molecular analysis reveals that the new species demonstrates significant genetic divergence (9.1-10.6%) in the mitochondrial COI gene from its closest congener, T. latruncularius. The new species exhibits a distinctive ecological association with the snapping shrimp Alpheus randalli, inhabiting sandy bottoms at depths of 18 m. Tomiyamichthys hyacinthinus sp. nov. is currently known only from southern Japan.
新种风信子富山鱼（Tomiyamichthys hyacinthinus sp. nov.）是根据采自日本南部九州的4个标本描述的。新物种具有以下特征组合：背鳍条Ⅵ -Ⅰ，9；臀鳍条Ⅰ，9；胸鳍条17；侧线鳞45 - 48，横列鳞14 - 15；第一鳃弓鳃耙4 + 8或9（9）；前骨盆区域部分被鳞；第一背鳍第四和第五棘之间有一个浅色斑点；雄性第一背鳍的第二和第三棘延长，呈丝状，有橙色带；雄性第一背鳍第四棘比第一棘长；雌性第一背鳍呈梯形，背鳍棘非丝状；尾鳍膜前部有2或3排横向黄色斑点，后部有纵向黄色斑点。比较分子分析表明，新物种与其最接近的同属物种长鳍富山鱼（T. latruncularius）在线粒体COI基因上表现出显著的遗传差异（9.1 - 10.6%）。新物种与兰氏鼓虾（Alpheus randalli）表现出独特的生态关联，栖息于18米深处的沙质底部。新种风信子富山鱼目前仅在日本南部被发现。
